A is for Voyager's Aeroshuttle which we never actually got to see.
B is for Bioplasmic Organism encountered by Voyager
C is for Cheron, which by 2268 had been devastated by racial violence and warfare that destroyed the planet's humanoid civilization and reduced the once-thriving population to just two survivors, Bele and Commissioner Lokai
D is for D'k tahg, a Klingon dagger
E is for Ezri Tigan from the Mirror Universe.
F is for Ferenginar, home of the Ferengi
G is for Gary 7.
H is for Hasperat, a spicy Bajoran dish enjoyed by Ro Laren
I is for Isolinear chips
J is for Jovian Run between Jupiter and Saturn by shuttle craft
K is for the Klingon bastard who killed Kirk's son.
L is for Lynar, a bat-like creature found on Celtriss III
M is for Montgomery Scott, Chief Engineer of the USS Enterprise. And charter member of it's AA club. Along with Kevin Riley.
N is for NX-01 Enterprise
O is for Opaka, Kai of Bajor
P is for Parmen, the authoritarian leader of the Platonians.
Q is for Qualor II.
R is for Ro Laren
S is for Sonic Showers
T is for Terok Nor.
U is for Uhura's voice
V is for Viinerine, a Romulan food served to its military. Once offered to Troi, but rejected.